Orbitally induced hierarchy of exchange interactions in zigzag antiferromagnetic state of honeycomb silver delafossite Ag3Co2SbO6

We report the revised crystal structure, static and dynamic magnetic properties of quasi-two dimensional honeycomb-lattice silver delafossite Ag3Co2SbO6. The magnetic susceptibility and specific heat data are consistent with the onset of antiferromagnetic long range order at low temperatures with N\'eel temperature TN ~ 21.2 K. In addition, the magnetization curves revealed a field-induced (spin-flop type) transition below TN in moderate magnetic fields. The GGA+U calculations show the importance of the orbital degrees of freedom, which maintain a hierarchy of exchange interaction in the system. The strongest antiferromagnetic exchange coupling was found in the shortest Co-Co pairs and is due to direct and superexchange interactions between the half-filled xz+yz orbitals pointing directly to each other. The other four out of six nearest neighbor exchanges within the cobalt hexagon are suppressed, since for these bonds active half-filled orbitals turned out to be parallel and do not overlap. The electron spin resonance (ESR) spectra reveal a Gaussian shape line attributed to Co2+ ion in octahedral coordination with average effective g-factor g=2.3+/-0.1 at room temperature and shows strong divergence of ESR parameters below 120 K, which imply an extended region of short-range correlations. Based on the results of magnetic and thermodynamic studies in applied fields, we propose the magnetic phase diagram for the new honeycomb-lattice delafossite

Penerimaan Sistem Informasi Akuntansi pada Pusat Kesehatan Masyarakat yang Baru Menjadi Badan Layanan Umum Daerah (BLUD)

This study aims to analyze the acceptance of public service agency (BLUD) accounting information system at BLUD health center in Boyolali, Center Java. TAM model is used in this study with behavioral theory perspective that used to for examine information technology adopted process. The samples used in this research is accounting and financial staffs at BLUD health center in Java that using BLUD accounting information system that developed by PT. Syncore Indonesia. Data obtained from questionnaires distributed be procesed using partial least square (PLS).The result of this research indicated 8 of 11 hipotheses are accepted. Where the result of this research showed relationship between users abilities and skills (UAS) toward percieved ease of use (PEOU), accounting information system (SIA) toward percieved usefulness (PU), percieved ease of use (PEOU) toward percieved usefulness (PU), percieved ease of use (PEOU) and percieved usefulness (PU) toward attitude toward using (ATU), percieved usefulness (PU) and attitude toward using (ATU) toward behavioral intention to use (BITU), and behavioral intention to use (BITU) toward actual system USAge (ASU) are positif significant

Modal Intelektual dan Kinerja Maqashid Syariah Perbankan Syariah di Indonesia

This study aims to analyze the influence of Islamic banking-intellectual capital (ib-vaic) covered; capital employed, human capital, and structural capital, toward maqashid shariah performance in Islamic Banking in Indonesia. This study used all (44 banks) Islamic banking that listing in Bank Indonesia (Central Bank of Indonesia) and Otoritas Jasa Keuangan (Financial Services Authority). Data analysis used SPSS (Statistical Product and Service Solutions) with multiple regression method. The results reveal that Islamic banking-human capital have positive influence on maqashid shariah performance. However, Islamic banking-capital employed and structural capital do not have influence on maqashid shariah performance